Enhanced vehicle handling with BPW LL self-steering axle
As delivery routes tighten and trailer lengths continue to grow, fleet operators face increasing pressure to improve manoeuvrability, reduce environmental impact, and comply with evolving regulations.
BPW says its LL self-steering axle offers fleet operators a proven and practical solution, helping operators enhance vehicle handling, extend tyre life, reduce fuel consumption, and simplify compliance with the latest regulatory demands.
“Since the Department for Transport (DfT) granted approval in 2023 for the use of Longer Semi-Trailers (LSTs) up to 15.65 metres on UK roads – 2.05 metres longer than the standard size – there has been a renewed focus on the need for efficient, compliant axle technology,” said the firm.
“LSTs support the government’s priority to drive further economic growth, cut emissions and strengthen supply chains. However, these benefits come with added operational responsibilities, including detailed route planning, enhanced driver training, and compliance with specific trailer configurations.
“The BPW LL self-steering axle addresses these demands with a passive design that operates entirely without the need for external power or complex steering stabilisers.
“Unlike conventional active or control steering systems, the axle uses a simple yet effective mechanism where the axle beam and axle stub are connected through a kingpin system, which uses thrust washers. This allows for smoother and better manoeuvrability in narrow traffic areas for delivery and distribution transport.”
When driving straight (zero position), the crowns in the thrust washers keep the wheels in the correct and stable straight-ahead position, BPW explains.
“As a result, it has been highlighted that the life of the tyres on the front axle can increase by up to 50 per cent, while those on the rear axle can increase by as much as 70 per cent.
“Engineered with real-world practicality in mind, the BPW LL self-steering axle also features an automatic self-locking facility that engages when reversing. To engage the mechanism, the trailer should be straight ahead, allowing greater stability and ease of operation. Forces acting on the tyres when cornering are then distributed more evenly.”
The BPW LL self-steering axle is available with steering angles of between 12 and 27 degrees, with the latter being suited for LSTs.
“Based on the proven beneficial principles of its existing self-steer, this additional angle of steer enables allocated licence-holders of 15.65-metre trailers to consider a self-steer axle, with no sacrifice of payload capability, against a more costly and heavier active or command steer system on their trailers.
“Where the LL self-steering axle truly proves its value is in demanding, real-world operations. Its improved manoeuvrability and reduced turning radius offer more straightforward vehicle handling, less tyre wear and lower fuel consumption.
“Over a distance of 100,000 kilometres, fleet operators can save as much as 1,000 litres of fuel and more than four tyres per vehicle.”
